/*
 * Copyright (c) 2023-2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

class DescribableFunction {
    description: string
    public invoke(someArg: number): string {
        return someArg.toString()
    }
    constructor() {
        this.description = "desc"
    }
}

function doSomething(fn: DescribableFunction): void {
    console.log(fn.description + " returned " + fn.invoke(6))
}

doSomething(new DescribableFunction())